Surface EMG characteristics of people with multiple sclerosis during static contractions of the knee extensors

Citation

Scott SM, Hughes AR, Galloway SD & Hunter A (2011) Surface EMG characteristics of people with multiple sclerosis during static contractions of the knee extensors. Clinical Physiology and Functional Imaging, 31 (1), pp. 11-17. https://doi.org/10.1111/j.1475-097X.2010.00972.x

Abstract
Objectives: This study was designed to determine whether any alterations existed in surface electromyography (sEMG) in people with multiple sclerosis (MS) during isometric contractions of the knee extensors. Methods: Fifteen people with MS and 14 matched controls (mean ± SD age and body mass index 53Æ7 ± 10Æ5 versus 54Æ6 ± 9Æ6 years and 27Æ7 ± 6Æ1 versus 26Æ5 ± 4, respectively) completed 20%, 40%, 60% and 80% of their maximal voluntary contraction (MVC) of the knee extensors. sEMG was recorded from the vastus lateralis where muscle fibre conduction velocity (MFCV) and sEMG amplitude (RMS) were assessed. Body composition was determined using dual-energy X-ray absorptiometry and physical activity with the use of accelerometry. Results: People with MS showed significantly (P

Keywords
maximal voluntary contraction; muscle fibre; Multiple sclerosis Patients; Electromyography; Muscles; Knee; Neuromuscular diseases

Journal
Clinical Physiology and Functional Imaging: Volume 31, Issue 1